Attachment for turning multiple-diameter shafts.



A. tl. NEWTON.

ATTACHMENT FOR TURNING MULTIPLE DIAMETER SHFIS.

APPLICATION FILED PEB. 28, 1908.

1 l l 81,875. Pteuued Nov. 24, 1914 2 SHEETS "SHEET l.

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A. B. NEWTON. ATTACHMENT Pon TURNTNG MULTIPLE DIAMETER .su/ms,

APPLICATION FILED TEIL 28 NO3. 1,1 18,875, Patented Nov. .24, 1914A fj 2 SHEETS SHEET 2.

burra erarne an @Fit/lili ALBERT E. NEWTON, 0F WORCESTER, MSSACHUSETTS, ASSIG-NOR, BY MESNE ASSIGN- MENTS, TO REED-PRENTICE COMPANY. OF WORCESTER, MASSACHUSETTS, A COB- I'ORATIN OF MASSACHUSETTS.

ATTACHMENT FOR TURNING MULTIPLE-DIAMETER SIAFTS.

Application filed February 28, 1908.

To all fle/wm. 'it may concern Be it known that I, ALBERT E. NEWTON. a citizen of the United States, residing at Worcester, in the county of lVorcester and State of lvlassachusetts, have invented a new and useful Attachment for Turning Multiple-Diameter Shafts, of which the fol lowing is a specification.

This invention relates to an attachment for turning multiple diameter shalls, and has heen especially designed for duplicate work. p

Many shafts which are used in machine work are turned to have various diameters. such as a small diameter at one cud increasing by steps up to the other end or to an in termediate part oit the shaft. l't is etten desired to make up a large number o1 such shafts. The attachment is designed to he applied to an ordinary or improved :form ot lathe for these purposes.

The attachment comprises a peculiar form et rest upon which a number oi blocks are mounted, each of which blocks carries a turning tool. Each block is also provided with a support which can be swung up and down and can be locked in its lowest or op erative position, which support carries rolls forming' supports for the work. This construction is used with a cutaway forni of tail stoel: arranged so that the blocks can be run past the tail stock and the tools brought into operation, one after the other. Means are provided so that the tools can be adjusted lengthwise relatively1 lo each other and also so that each tool can be adjusted rclativch7 to the work arranged so a that when these adjustments are once made,

they can be kept for duplicate work. ln the preferred 'form oit structure, the lathe is arranged to run backward as compared with the usual operation and the blocks are placed on the rear arm of the rest. The tail stock block is cut awa)Y or recessed on its back side so that the long arm ol? the rest which carries the blocks can pass the tail stock. By this attachment, the results above specii fied can he easily accomplished.

The invention is illustrated in the acoonr panying two sheets of drawings forming part o this application, referring; to which,

Figure is e front elevation showing the improved attachment. .tig4 SB is a diagram- Specication. of Lettersv Patent.

Patented Nov. 2d, MMA.

Serial No. l18,216

matic View illustrating the work produced. Fig. 3 is a side elevation of the improved 55 form of tail stock. Fig.4is a cross se'tional View taken on |the line fl--fl of Fig. 3. Fig.

5 is an end view of part of` one of the blocks and of the tail stock. Fig. 6 is a lan of the peculiar form of rest which is used. Fig. en 7 is an end elevation of one of the improved blocks showing the support carried thereby. Fig. 8 is a lan thereof. Fig. 9 is a detail of the locking means for holding the tool in place in the block, and Fig. 10 is 'a 65 trout elevation of the rest and blocks mounted thereon.

Referring to the drawings and in detail,

A designates the lathe bed mounted on the end of which is any of the usual heed- 7e Stocks B.

C designates the apron which is secured to the front of the rest D.

'The lathe is provided with the usual leadscrew 0r eed-shai`t 10 and also with a feed- '15 rod 11 which parts engage suitable mechanism in the apron so that the rest can be fed alongr the ways of the lathe inthe usual way. A collar 12 is adjustahly secured on the rod il and the saine forms au adjust 80 able throwout mechanism :t'or limiting the left-hand or feed movement ofthe rest. A face plate 13 is screwed on the end of the `spindle in the head stock in the ordinary manner and a lacy 14 is arranged between 85 the spindle and face plate so that the power can be taken through the face plate with the lathe running;l backward without unscrewing the face plate from the spindle. Theusual center 15 is placed in the head 80 stoel: spindle. By this arrangement, the work can he turned backward as compared with the ordinary lathe.

The construction of the tail stock is indicated more particularly in Figs. 8, a and 5. The tailstock consists of a ilate 16 which is fitted to slide on the inside ways of the lathe bed. Fitted to slide laterally on said plate 16 is the tail-stock bloclcl'l'l The block 17 is adjustable ou the plate by screws 100 18. A binder 19 is fitted under the lathe ways and is connected to the block by a shaft 20 which has an adjustable nut on the end thereof. The top of the Shaft 2i) is bei-ed out audfttedinto the same is an eccentric formed on a shaft '21 iournaled in the yso ' sujiporting tool may be very powerfully and quickly clamped in substantially its proper position. A dovctail is formed on the top ot the member #lil and fitting the same is a block 5l which is held in place on the dovetail by a gib which is tightened by screws 53 passing through the block 5l and threaded into said gib. By this arrangement, the block 5'1 .is adjustable on the part leland can be clamped in its adjusted position by tightening screws 53, so that when necessary the position of the supporting rrollers here1uafter described may be adjusted. The top ol the block 51 has an Lshaped slot planed in the saine, as shown in Fig. l0. A roller support having:r a cross section, as indicated in Fig. l0, is fitted in said slot and is pivoted on a. 'pin 5G driven through the sides of the block 5l so as to pass through the slot. "lhe roller support 55 is provided with a projection or arni 5T which lits into the horizontal part of the l..-shaped slot 5i in the block. The sifipport 55 is not made .as wide as the slot by the thickness ot' this part so that when the support is moved to the left. as shown for example at the seeA ond block counting from thc left in Fig. l0.

the support can be moved up out oit'v the slot 5t, but so that when the support islnored to the right, as shown-at the third block counting from the left in Fig. 10, the part 57 will ei'igage in the liorizontal portion of the L- shaped slot ahd will thus he securely locked in position. It also will be. noticed that this locking; n'loveineait oi the support toward 'the right or in the contrary or opposite, direction to the feed so that any drag;r ou the rollers hereinafter described will tend to keep the support more firmly in the l..-shaped slot. The righthand end ot the slot is counteuborcd around the piu 5o and a spring is placed therein, as slmwn in Fig. 8, which spring will normally tend to force 'the support to the position shown on the second block as above numliered, so that `the saine normally iu position tube turned about the pin 5G. To lock the support in its right-hand position, a shaft 58 journaled in the block and is provided with an eccentric 59 which engages the lett-hand lface oi the support A handle (3() is secured ou the end ot' this shaft and by turning this handle, the support can be powerfully forced to the right and into locking position in the .l shaped slot. When it is desired to turn up the support, the handle is moved to release the eccentric 59 from engagement with the support 55. The support is ex tended out around the work as shown in Fig. 7 and is provided with ways (il preterably on both sides thereof in which are fitted sliders (i2 which are yoked at tlieir lower ends and which carry 'pins on which are mounted rollers 63. The sliders are adjusted by screws G4' threaded in projections formed ou the support and are clamped `in position by screws (35 passing through slots in the support and threaded into the sliders. The ways (3l are preferably 'formed on both sides ot the support 55 so that the sliders can be placed on either side ol the support 55 to come approximately in any desired position on the shalt S which is being turned, the heads on the screws (i5 being made wide so that the saine will lit down into the slots, as indicated in Fig. S. It is usually the prac-4 tice to provide two screws (il in each support tor each slider so that the sliders can `be quickly shifted from one side to the other ol" the support. lly thisconstruction, the. rolls can be set accurately to the work and can be held in their clamped positions.

',ll'ie operation is substantially as follows:",.\ dog is placed on the work in the usual way which dogl is engaged with the 'lace plate lil. '.lhe tail-stock and center are then adjusted so that the work will be held on the centers. l`he supports are turned up and the lathe rest is run to the extreme right so that the lel`t-hand tool will clear the right-hand end o'l the work. The tool blocks are adjusted longitudinally accu. ratcly on the rear arni 3l o'l the rest so that they will be a distance apart equal to the length olI the various diameters it is desired to gire to the shaft. The tools are then, as they come into position. adjusted arazurately crosswise of the lathe so that they will give the exact diameters desired for the various sections ol: the shaft. Suppose it is desired to turn a shaft to have tour steps oi` dill'erent diameters and oi the lengths shown in Fie'. il, the tools are then adjusted as indicatori. .\s the lathe is put into operation the lett-hand tool will first engage the work and reduce the salue to the size :for which it is set. l,`he second tool will next engage the worl: and then the third and the -fourth tool, the tools coming into operation one after the otlieiyand the suc (feeding tools acting' on thediameter lett by the previous tools. Thus in the illustration Ain Fig. L the lett-hand bearing ot the shaft will have been turned by one tool, the second by two tools. the third by three tools, and the 'Fourth by tour tools. As the tools surressivelj' come into operation. the hearinjjr pieces 55 are swung down and locked in their operati.'c position so that thc rollers ('l will engage. the work just behind or to the right of each tool whereby the shaft will be ara-,urately supported independently of its centers so that powerful heavy cuts can be taken on the same without liability of springing. `When the rest stops at its left hand position. the shaft will have been* turned at one operation to the condition shown in Fig. The left-hand unfinished end of the sha'lt can be turned at a separate operation pr if the worlY demands, the' work l. In u lathe attac-mmm for inviting tipi@ (lnmtm Hlml's, :a had hmmV thmeun, n i'csi having pm'uicl,

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